Update a variant

patch /api/products/{productId}/variants/{variantId}

Updates the Product Variant resource.

Partially updates a variant. The body is a JSON Merge Patch document: any field you include replaces the current value, and any field you omit is left untouched.

Merge Patch semantics

Omit a field to leave it untouched, or send a new value to replace it. Non-nullable fields such as sku and barcode reject null - you can change them but not clear them.

Path parameters

Name	Type	Required	Description
productId	string	required	ProductResource identifier
variantId	string	required	Product Variant identifier

Request body

Property	Type	Required	Description
barcode	string	-	The barcode, unique UPC, or ISBN number for the product.
measurement	EmbeddedMeasurementResource | null	-	The measurement used to compute per-unit prices for the variant.
Show measurement fields Property Type Required Description measuredType "volume" | "weight" | "length" | "area" | "unit" required The kind of physical quantity measured (volume, weight, length, area or unit). quantityUnit "ml" | "cl" | "l" | "mg" | "g" | "kg" | "mm" | "cm" | "m" | "m2" | "unit" required The unit the variant's quantity is expressed in. quantityValue integer required The variant's quantity, expressed in the quantity unit. referenceUnit "ml" | "cl" | "l" | "mg" | "g" | "kg" | "mm" | "cm" | "m" | "m2" | "unit" required The unit used as the basis for per-unit price calculations. referenceValue integer required The number of reference units used for per-unit price calculations.
medias	string[]	-	A list of Media, ordered by position. Only media of type "image" can be associated with a variant. Returned as IRI strings by default; pass ?expand=medias to embed full Media objects. Requires the medias:read scope. Returned empty when the scope is missing.
optionValues	string[]	-	A list of Option Value, each one representing an option value associated with the variant. Requires the products:read scope. Returned empty when the scope is missing.
sku	string	-	A unique identifier for the product variant.

Response

200 - Product Variant resource updated

Property	Type	Required	Description
@context	string | object	-
@id	string	required
@type	string	required
barcode	string	required	The barcode, unique UPC, or ISBN number for the product.
createdAt	string	-	The date and time when the resource was created (ISO 8601 format).
id	string	-	The resource's unique identifier (UUID).
measurement	EmbeddedMeasurementResource | null	-	The measurement used to compute per-unit prices for the variant.
Show measurement fields Property Type Required Description measuredType "volume" | "weight" | "length" | "area" | "unit" required The kind of physical quantity measured (volume, weight, length, area or unit). quantityUnit "ml" | "cl" | "l" | "mg" | "g" | "kg" | "mm" | "cm" | "m" | "m2" | "unit" required The unit the variant's quantity is expressed in. quantityValue integer required The variant's quantity, expressed in the quantity unit. referenceUnit "ml" | "cl" | "l" | "mg" | "g" | "kg" | "mm" | "cm" | "m" | "m2" | "unit" required The unit used as the basis for per-unit price calculations. referenceValue integer required The number of reference units used for per-unit price calculations.
medias	array	-	A list of Media, ordered by position. Only media of type "image" can be associated with a variant. Returned as IRI strings by default; pass ?expand=medias to embed full Media objects. Requires the medias:read scope. Returned empty when the scope is missing.
metafields	array	-	Metafields owned by this variant. Serialized as IRI strings by default; pass ?expand=metafields to embed full MetafieldResource objects. Requires the metafields:read scope. Returned empty when the scope is missing.
optionValues	array	-	A list of Option Value, each one representing an option value associated with the variant. Requires the products:read scope. Returned empty when the scope is missing.
product	string | Product | null	required	The product resource it belongs to. Requires the products:read scope. Returned null when the scope is missing.
resolvedPrice	ResolvedPriceResource | null	-	The price resolved for the current resolveContext (country, channel and instant). Null unless resolveContext[country], resolveContext[channel] and resolveContext[at] are all provided.
Show resolvedPrice fields Property Type Required Description at string - The instant used to resolve the price (defaults to request time). channelId string - The Channel used to resolve the price. countryId string - The Country used to resolve the price. currency string - ISO 4217 currency code (mirrors price.currency for convenience). discountPrice EmbeddedMoneyResource | null - The discount price including tax, if any. Show discountPrice fields Property Type Required Description amount string required The monetary amount, as a decimal string. currency string required The ISO 4217 currency code (e.g. EUR). discountTaxExcludedPrice EmbeddedMoneyResource | null - The discount price excluding tax, if any. Show discountTaxExcludedPrice fields Property Type Required Description amount string required The monetary amount, as a decimal string. currency string required The ISO 4217 currency code (e.g. EUR). lowestPriceLast30Days EmbeddedMoneyResource | null - Lowest price including tax observed on the rolling window [at - 30 days, at] for the same (variant, channel, country). Falls back to the current price when no prior data exists. Show lowestPriceLast30Days fields Property Type Required Description amount string required The monetary amount, as a decimal string. currency string required The ISO 4217 currency code (e.g. EUR). lowestPriceLast30DaysAt string | null - The instant at which lowestPriceLast30Days was active. Falls back to at when no prior data exists. price EmbeddedMoneyResource - The price including tax. Show price fields Property Type Required Description amount string required The monetary amount, as a decimal string. currency string required The ISO 4217 currency code (e.g. EUR). saleOfferId string - The SaleOffer that was resolved. taxExcludedPrice EmbeddedMoneyResource - The price excluding tax. Show taxExcludedPrice fields Property Type Required Description amount string required The monetary amount, as a decimal string. currency string required The ISO 4217 currency code (e.g. EUR). taxRate number - Tax rate applied, in percent (e.g. 20.0).
sku	string	required	A unique identifier for the product variant.
updatedAt	string	-	The date and time when the resource was last modified (ISO 8601 format).

Errors

400 - Invalid input

Property	Type	Required	Description
@context	string | object	-
@id	string	required
@type	string	required
code	string	-	Stable identifier of the error in the error code catalogue (see /api/error-codes). Present on catalogued errors only.
description	string | null	-
detail	string | null	-	A human-readable explanation specific to this occurrence of the problem.
instance	string | null	-	A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced.
message	string	-	End-user message localized in the request locale, with this occurrence's values substituted. Present on catalogued errors only.
slug	string	-	Stable, readable key of the error in the error code catalogue. Present on catalogued errors only.
status	integer | null	-
title	string | null	-	A short, human-readable summary of the problem. For a catalogued error it repeats the slug.
type	string	-	A URI reference that identifies the problem type. For a catalogued error it is the error code resource, /api/error-codes/{code}.

403 - Access denied. The caller is missing one or more permissions required for this operation.

Content-Type: application/problem+json

Property	Type	Required	Description
@context	string | object	-
@id	string	required
@type	string	required
detail	string	-
missingPermissions	string[]	-	Permissions that the caller is missing for this operation. Present only when the 403 is caused by a denied permission.
status	integer	-
title	string	-
type	string	-

404 - Not found

Property	Type	Required	Description
@context	string | object	-
@id	string	required
@type	string	required
code	string	-	Stable identifier of the error in the error code catalogue (see /api/error-codes). Present on catalogued errors only.
description	string | null	-
detail	string | null	-	A human-readable explanation specific to this occurrence of the problem.
instance	string | null	-	A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced.
message	string	-	End-user message localized in the request locale, with this occurrence's values substituted. Present on catalogued errors only.
slug	string	-	Stable, readable key of the error in the error code catalogue. Present on catalogued errors only.
status	integer | null	-
title	string | null	-	A short, human-readable summary of the problem. For a catalogued error it repeats the slug.
type	string	-	A URI reference that identifies the problem type. For a catalogued error it is the error code resource, /api/error-codes/{code}.

422 - An error occurred

Property	Type	Required	Description
@context	string | object	-
@id	string	required
@type	string	required
description	string	-
detail	string	-
instance	string | null	-
status	integer	-
title	string | null	-
type	string	-
violations	object[]	-
Show violations fields Property Type Required Description code string - The code of the violation hint string - An extra hint to understand the violation message string required The message associated with the violation parameters object - Dynamic placeholder values for the violation message template (substitute into the code catalogue message). payload object - The serialized payload of the violation propertyPath string required The property path of the violation slug string - Stable centralized error-code slug for this violation (see /api/error-codes).